Good morning. Welcome to Axios today. It's Thursday, September 10th. I'm Naila Boodoo.

Here's how we're making you smarter today. Why the Senate stimulus bill will likely fail.

Plus, the millions of dollars being spent to build a firewall around

Kamala Harris against disinformation.

But first, the inconvenient truth about air pollution is today's one big thing.

I woke up today to dark orange skies outside my window.

This is due to wildfires burning throughout the entire west.

There are multiple layers of smoke high up in the air

from these fires.

That San Francisco Mayor London Breed

talking about the orange haze above the bay area yesterday morning.

Large parts of California, Oregon, and Washington State have been burning for weeks.

This has led to dangerous air quality levels throughout the West Coast.

It really drives home the way that air pollution is something we can see but even worse is what it's actually

doing to our bodies in an invisible sort of fashion.

Brian Walsh's Axios' future correspondent.

The fires on the West Coast are an extreme weather and air pollution event.

But Brian, I was shocked to read in your story that air pollution is estimated to contribute

to at least 5 million premature deaths around the world every year.

The more we learn about air pollution,

the scarier really becomes for human health.

It turns out that even very small particles can really get into the body

...